His pay on that day will be $153
From the question, he paints 38 ducks while two of these failed inspection and were rejected
The number of ducks passing inspection will be 38-2 = 36
This means he will get paid on that day for painting 36 ducks
Since he gets $4.25 for a duck
For 36 ducks, the amount he will get will be = 36 * $4.25 = $153